DTC Help - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 15 (permalink) Old 09-14-2006, 01:32 AM Thread Starter
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DTC Help

My dad was running his truck a 2001 3500 and it was running stock well and then it was shut off for about 15 min. then when tried to start no worky. The contacts are bad but when it does crank it cranks fine. The dtc show inj. pump failure with P1689 "no communication with ECM and Inj. pump mod." P1688 " Internal fuel inj. pump failure" P0602 " ECM fueling calibration erreo " The truck has about 115K miles on original vp44. The lift pump went at about 95K miles and the inj. pump showed a timing erreo so I suppose this is the sfter math of the lift pump failure. Thank you for the help
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post #2 of 15 (permalink) Old 09-14-2006, 01:44 AM
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i would say you injection pump is bad. hard to start when warm is a sign the pump is bad. did the lift pump go completely out when you changed it?

Randy
05 Dodge str8 pipe, smarty jr, afe, airbags, and pacbrake.
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post #3 of 15 (permalink) Old 09-14-2006, 01:52 AM Thread Starter
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yeah it had no pressure at the shrader on the pump.
thank you
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post #4 of 15 (permalink) Old 09-14-2006, 02:05 AM
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Better start saving some pennies for a pump. Get a Hot Rod VP44 & a FASS system and be done with it.
post #5 of 15 (permalink) Old 09-14-2006, 02:16 AM Thread Starter
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you think the pump would just shut off an $hi just like that. if so who has a good pump at a reasonable cost.
Thank you
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post #6 of 15 (permalink) Old 09-14-2006, 02:23 AM
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Yes, they can go out just like that. As stated previously, a 44 is more likely to go out when warm than when cold.

Schieds HRVP44 is hard to beat for the price. Stay away from the India rebuilds for $999 that lots of people are selling. You will be replacing another one of those in short order.
post #7 of 15 (permalink) Old 09-14-2006, 02:38 AM
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i would go with schied. ive had good luck with there stuff.

Randy
05 Dodge str8 pipe, smarty jr, afe, airbags, and pacbrake.
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post #8 of 15 (permalink) Old 09-14-2006, 02:49 AM
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When Schied rebuilds a pump, they use all NEW Bosch parts. Not reman/rebuilt, aftermarket China junk. They are a Bosch Certified pump shop.
post #9 of 15 (permalink) Old 09-14-2006, 03:49 AM Thread Starter
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thank you for the info I will be calling schieds
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post #10 of 15 (permalink) Old 09-14-2006, 05:28 AM
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is it just when the truck is hot that it has trouble starting? If this is the case, its probably the fuel metering diaphram in the VP. The low (or in your case 0)psi supplied by the lift pump, causes the diaphram to move up to four times further than it was disigned to move, 2mm vs. 0.5mm. The higher pressure from the new lift pump can keep the diaphram from moving. This diaphram is mainly needed for warm starts.
If you are consistently having trouble starting when warm, disconnect the pigtail to the lift pump, and see if the truck will start. If the metering diaphram is the culprate, the truck should fire right up. IF IT DOES, SHUT IT OFF IMMEDIATELY!!!!!
Anyways, if the diaphram is the problem, it can be dealt with a lot cheaper than buying a new injection pump. This is a problem that I had, and fixed for about $25(If that).
Just a thought. I hate to see someone spend a lot of money they don't need to.
Sean

2000 2500 reg. cab 4x4 auto 577hp
09 6.7L QC LB stick, 4x4.

TOTAL PERFORMANCE DIESEL 707-545-FUEL (3835)
www.totalperformancediesel.com
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